Preheat oven to 400°F. Lightly grease 2 - 12-cup muffin pans.,Heat oil in a large saucepan over high heat. Saute bacon and onion for 3-4 mins, until onion is tender. Add ground beef and brown for 4-5 mins. Add flour and cook, stirring, for 1 min. Add beer, stock, tomato paste and chopped rosemary. Bring to a boil, stirring, then reduce heat and simmer, uncovered, for 10 mins, or until mixture reduces and thickens. Let cool for 10 mins then chill.,______,Using a sharp knife, make two small slits in each lid. Bake for 20-25 mins, or until golden brown. Allow to rest for 5 mins then transfer to serving plates. Serve with tomato sauce.